Answer:
0.33
Step-by-step explanation:
Let A denote an event. The odds of the horse finishing second is 33 to 67.
From the information, the total outcomes of event A is:

Hence, there are 100 total outcomes. The probability of the horse finishing second is calculated as:

Hence, the probability of finishing second is 0.33
That's easy 172.1 times 10 with the exponent of 7
.